diff --git a/devenv.lock b/devenv.lock
index 0f594d4a31c33da49681243ed27743ec75a0ba3a..916141438549ab4a905bf7b1a088505985d66ada 100644
--- a/devenv.lock
+++ b/devenv.lock
@@ -74,16 +74,16 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1689449371,
-        "narHash": "sha256-sK3Oi8uEFrFPL83wKPV6w0+96NrmwqIpw9YFffMifVg=",
-        "owner": "NixOS",
+        "lastModified": 1689431009,
+        "narHash": "sha256-hPgQCRWP5q/Xc4qOIP3c2krR9nQua78+t9EDiuey5nc=",
+        "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "29bcead8405cfe4c00085843eb372cc43837bb9d",
+        "rev": "af8279f65fe71ce5a448408034a8c06e2b4b2c66",
         "type": "github"
       },
       "original": {
-        "owner": "NixOS",
-        "ref": "nixpkgs-unstable",
+        "owner": "nixos",
+        "ref": "nixos-23.05",
         "repo": "nixpkgs",
         "type": "github"
       }
@@ -115,11 +115,11 @@
         "nixpkgs-stable": "nixpkgs-stable"
       },
       "locked": {
-        "lastModified": 1689328505,
-        "narHash": "sha256-9B3+OeUn1a/CvzE3GW6nWNwS5J7PDHTyHGlpL3wV5oA=",
+        "lastModified": 1689553106,
+        "narHash": "sha256-RFFf6BbpqQB0l1ehAbgri9g9MGZkAY9UdiNotD9fG8Y=",
         "owner": "cachix",
         "repo": "pre-commit-hooks.nix",
-        "rev": "5e28316db471d1ac234beb70031b635437421dd6",
+        "rev": "87589fa438dd6d5b8c7c1c6ab2ad69e4663bb51f",
         "type": "github"
       },
       "original": {
diff --git a/devenv.yaml b/devenv.yaml
index c7cb5cedadc04e17a1703f298db573f43c79cad8..8c47a8d08c983cb1085eb2c566b97a9a206d4dec 100644
--- a/devenv.yaml
+++ b/devenv.yaml
@@ -1,3 +1,3 @@
 inputs:
   nixpkgs:
-    url: github:NixOS/nixpkgs/nixpkgs-unstable
+   url: github:nixos/nixpkgs/nixos-23.05
diff --git a/flake.nix b/flake.nix
index 33094b2f140ea149d6c0e82f16bddb57ebb59466..c30f09eb7b46fa7ae1790daae84af14524fdff1b 100644
--- a/flake.nix
+++ b/flake.nix
@@ -2,7 +2,7 @@
  description = "Version is a program that automates and simplifies the process of incrementing version numbers for software projects.";
 
   # Nixpkgs / NixOS version to use.
-  inputs.nixpkgs.url = "nixpkgs/nixos-unstable";
+  inputs.nixpkgs.url = "nixpkgs/nixos-23.05";
 
   outputs = { self, nixpkgs }:
     let